55005279681 has 16 divisors (see below), whose sum is σ = 80366469120. Its totient is φ = 33187037520.

The previous prime is 55005279569. The next prime is 55005279761. The reversal of 55005279681 is 18697250055.

It is a happy number.

It is not a de Polignac number, because 55005279681 - 2¹⁵ = 55005246913 is a prime.

It is a super-2 number, since 2×55005279681² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55005279681.

It is not an unprimeable number, because it can be changed into a prime (55005272681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3729921 + ... + 3744638.

It is an arithmetic number, because the mean of its divisors is an integer number (5022904320).

Almost surely, 2^55005279681 is an apocalyptic number.

It is an amenable number.

55005279681 is a deficient number, since it is larger than the sum of its proper divisors (25361189439).

55005279681 is a wasteful number, since it uses less digits than its factorization.

55005279681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7474796.

The product of its (nonzero) digits is 756000, while the sum is 48.

The spelling of 55005279681 in words is "fifty-five billion, five million, two hundred seventy-nine thousand, six hundred eighty-one".